Charming bon vivant Rudolf is convinced that infidelity is the basis for a happy marriage, since, after all, a woman does not want to be bored with her partner. Therefore, it is better to keep her fighting for him. Rudolf, now in his Sixties, has successfully applied his wild theory in everyday practice. Obviously, he does not understand the naivety of his son-in-law Andrew, who tries to be a dutiful husband. He decides to try to help him; after all, he is the husband of his only daughter.